Index: trunk/ppSim/src/ppSimArguments.c
===================================================================
--- trunk/ppSim/src/ppSimArguments.c	(revision 24807)
+++ trunk/ppSim/src/ppSimArguments.c	(revision 29011)
@@ -55,4 +55,6 @@
     psMetadataAddStr(arguments,  PS_LIST_TAIL, "-galmodel", 0, "Type of Galaxy model", NULL);
     psMetadataAddS32(arguments,  PS_LIST_TAIL, "-bin", 0, "Binning in x and y", 1);
+    psMetadataAddS32(arguments,  PS_LIST_TAIL, "-nx", 0, "cell x-size in pixels", 0);
+    psMetadataAddS32(arguments,  PS_LIST_TAIL, "-ny", 0, "cell y-size in pixels", 0);
     psMetadataAddBool(arguments, PS_LIST_TAIL, "+photom", 0, "Perform photometry on fake sources", false);
 
@@ -197,4 +199,7 @@
     ppSimArgToRecipeS32(&status,  options, "BINNING",       arguments, "-bin");
 
+    ppSimArgToRecipeS32(&status,  config->arguments, "NX.CELL", arguments, "-nx");
+    ppSimArgToRecipeS32(&status,  config->arguments, "NY.CELL", arguments, "-ny");
+
     if (type == PPSIM_TYPE_OBJECT) {
         // Load values required for adding stars